TTL Converter Module 5V - 3.3V Bidirectional 2 Channel I2C Logic Level

Connecting a 3.3V device to a 5V system is a challenge.
The bidirectional logic level converter is a small device that safely drops the signals from 5V to 3.3V and increases 3.3V to 5V at the same time.
This level converter also works with 2.8V and 1.8V devices. What really separates this logic level converter from our previous versions is that it can successfully set its high and low voltages and go up and down between them safely on the same channel.
Each level converter has the ability to convert 4 pins on the high side to 4 pins on the low side with two inputs and two outputs provided for each side. The level converter is very easy to use. The board needs to be powered from the two sources of voltage (high voltage and low voltage) that your system is using.

Converter RS232/485/422 to Ethernet RJ45 has been designed for the industrial environment. It combines multiple functions including serial server, Modbus gateway, MQTT gateway, RS485 to JSON, etc. The module has an RS232/485/422 and Ethernet port (PoE function).Suitable for applications such as data acquisition, IoT gateway, IoT security. and smart device monitoring.

This converter has an internal DC / DC supply and a total isolation between the USB and the RS485 output and allows to establish a reliable and safe communication.
Its FT232RL component has excellent compatibility and a communication rate up to 3M for a maximum distance of 1.2 km. The RS485 output interface uses an optical coupler with high speed for an optical insulation of 1500V and a protection against lightning of 600W: these characteristics allow to protect the computer from the potential damage of static electricity, lightning, over voltages and ground faults. Optical Isolated Converter FT232RL USB 2.0 to RS485 features:
- Required systems: WINDOWS CE / 2000 / XP / VISTA / WIN 7 / LINUX / MAC OS
- Internal DC />

A multiplexer of this type actually only acts as a switch 16 to a 1.
The 4 digital pins are used to set high or low, (binary Y0-Y15) to determine which input pin is connected to pin "Z".
The control input S0-S3 is set to low "logic level 0", the signal C0 is connected to the output Z. Multiplexer 16 Channels CD74HC4067 MUX/DEMUX features:
- Based on chip CD74HC4067
- Analog signal input: Y0-Y15, 16 channels
- Analog signal output: Z pin
- Digital input, channel control: S0-S3
- Module size: approx. 4 x 1.8cm
- Package includes:
* 1 x CD74HC4067 MUX connection module
* 2 x row of soldering pins

Standard ISP download port, for on-line programming. Built-in crystal oscillator circuit (8MHz), crystal are replaceable. Has reset push button, power reset push button. 

Converter Module RS485 a Transceiver TTL 485 Max485 5V PLC features:
- Working voltage and TTL levels: 5V
- Size: 44 x 14 mm

This converter has internal DC/DC power supply and full isolation between USB and RS485 output and enables to establish reliable and secure communication. It adopts the original FT232RNL and SP485EEN chip solution, provides stable communication with built-in galvanic isolation, lightning protection and anti-electrostatic protection, etc., it is an ideal choice for industrial control equipment and/or applications with high communication requirements.

This is a CH340G TTL UART 5V serial adapter, designed to allow adding a USB connection to your project.
In addition, this opens up the possibility of programming microcontrollers like the Arduino Pro mini.
This module allows you to connect your project, from programming small microcontrollers to a custom computer keyboard.
The module is ready for use of a UART connection.
This may require the installation of a driver; however, it is a standard driver distributed by Microsoft Windows Update, available in Linux and that can be configured in MAC OS.
Adapter module CH340G LC Technology -TTL UART 5V series features:
- Manufacturer: LC Technology,
- Communication chipset: CH340G
- Communication: UART,
- Pin connection:

The PCF8591 is a low-power 8-bit single-chip, single-chip, 8-bit data acquisition device with four analog inputs, an analog output, and an I2C serial bus interface.
Three address legs A0, A1 and A2 are used to program the hardware address, allowing the use of up to eight devices connected to the I2C bus without additional hardware.
Address, control and data to and from the device are transferred in series through the two-way bidirectional I2C bus. Analogue to Digital Converter PCF8591T features:
- Main chip: PCF85911
- Operating voltage supply: 2.5 - 6 V
- Low standby current
- Serial input / output through the I2C bus
- 3 hardware address pins A0, A1, A2
- Sampling speed given by the I2C bus speed

Ideal for connecting TTL RS232 devices to your PC through the USB port. USB to A RS232 UART TTL 5V Converter + Cables features:
- Compatible controller PL2303HX
- 5 pins: 3.3v, 5.0v, TXR, RDX, GND
- Heat shrinkable insulating cover
- LED indicators of data transmission
- 2.5A self-recovery protective fuse
- Supported OS: WinME, Win2003, Win XP, Vista, Win 7, Linux
- Weight: 40 gr. (approx.)